Been playing simutrans on and off over the last couple of years and it is an awesome achievement. However, having had a gap and just rebuilt my computer, I've downloaded the current standard (120 standard and 1.16 Britain) and I am rather confused.
In short, how are you supposed to use the half height aspect that has been introduced? I assume this was to reduce the impact of gradients on performance, but my main query is how to do tunnels since the tunnel build icons only work on "full" height slops and yet every slope is half height. So, what is it I've missed in understanding this and how to adjust (if need be) the terrain to get tunnels working?
cheers for any help !